# cnd_broadcast

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< c‎ | thread

Defined in header ``<threads.h>`` |  |
int cnd_broadcast( cnd_t *cond ); |  | (since C11)

Unblocks all threads that are blocked on condition variable `cond` at the time of the call. If no threads are blocked on `cond`, the function does nothing and returns `thrd_success`.

### Parameters

cond | - | pointer to a condition variable

### Return value

thrd_success if successful, thrd_error otherwise.

### References

- C17 standard (ISO/IEC 9899:2018):

  - 7.26.3.1 The cnd_broadcast function (p: 275-276)

- C11 standard (ISO/IEC 9899:2011):

  - 7.26.3.1 The cnd_broadcast function (p: 378)

### See also

cnd_signal (C11) | unblocks one thread blocked on a condition variable (function)
C++ documentation for condition_variable::notify_all
C++ documentation for condition_variable_any::notify_all

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